The Collaborative International Dictionary of English v.0.48:

Pleurapophysis \Pleu`ra*poph"y*sis\, n.; pl. Pleurapophyses.
   [NL. See Pleura, and Apophysis.] (Anat.)
   One of the ventral processes of a vertebra, or the dorsal
   element in each half of a hemal arch, forming, or
   corresponding to, a vertebral rib. -- Pleu*rap`o*phys"i*al,
   a. --Owen.
   [1913 Webster]